Describe the Endosymbiont Theory. Write the evidences that support this theory

The Endosymbiont Theory proposes that certain organelles in eukaryotic cells, particularly mitochondria and plastids (like chloroplasts), originated from free-living prokaryotic organisms that were engulfed by a host cell in a symbiotic relationship. According to this theory, these engulfed prokaryotes established a mutualistic relationship with the host, eventually evolving into permanent cellular structures within the eukaryotic cell. The theory was first proposed by the American biologist Lynn Margulis in the 1960s and has since been supported by various lines of evidence from molecular biology, genetics, and comparative cell biology.

One of the main pieces of evidence supporting the Endosymbiont Theory is the similarity in the structure of mitochondria and plastids to certain prokaryotes, specifically the bacteria. Both mitochondria and plastids share a double membrane structure, which suggests that they were engulfed by the host cell through endocytosis. The ____ ___ _______ ________ ____ ______ __________ ______ ________ ___ ___.
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